| 摘要 |
A traffic filter for a decentralised peer-to peer data network is described. The data network comprises a number of interconnected ultrapeer nodes, each ultrapeer node being arranged to accept connections from a number of leaf nodes; maintain a database identifying material available from each connected leaf node, receive search queries from connected leaf nodes and other ultrapeers, forward received search queries to connected ultrapeers and provide data from the database matching a received search query. The traffic filter includes an ultrapeer node, a filter module and a protected material database. Upon receiving a search query the ultrapeer node is arranged to pass the query to the filter module. The filter module is arranged to analyse the query in dependence on content in the protected material database to determine if the query relates to protected material, the filter module being arranged to filter queries relating to protected material and pass non-filtered queries to the ultrapeer node for subsequent processing.
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